bundles/org.eclipse.ui.presentations.r21/src/org/eclipse/ui/internal/presentations/r21/widgets/CTabItem.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2004 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.presentations.r21.widgets;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.SWTError;
 import org.eclipse.swt.SWTException;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Item;
 import org.eclipse.swt.widgets.Widget;

 public class CTabItem extends Item {
     CTabFolder parent;

     int x, y, width, height = 0;

     String toolTipText;

     Control control; // the tab page

     private Image disabledImage;

     // internal constants
     static final int LEFT_MARGIN = 4;

     static final int RIGHT_MARGIN = 4;

     static final int TOP_MARGIN = 3;

     static final int BOTTOM_MARGIN = 3;

     private static final int INTERNAL_SPACING = 2;

     private static final String ellipsis = "..."; //$NON-NLS-1$

     String shortenedText;

     int shortenedTextWidth;

     /**
      * Constructs a new instance of this class given its parent
      * (which must be a <code>CTabFolder</code>) and a style value
      * describing its behavior and appearance. The item is added
      * to the end of the items maintained by its parent.
      * <p>
      * The style value is either one of the style constants defined in
      * class <code>SWT</code> which is applicable to instances of this
      * class, or must be built by <em>bitwise OR</em>'ing together
      * (that is, using the <code>int</code> "|" operator) two or more
      * of those <code>SWT</code> style constants. The class description
      * lists the style constants that are applicable to the class.
      * Style bits are also inherited from superclasses.
      * </p>
      *
      * @param parent a CTabFolder which will be the parent of the new instance (cannot be null)
      * @param style the style of control to construct
      *
      * @exception IllegalArgumentException <ul>
      *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
      * </ul>
      * @exception SWTException <ul>
      *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
      * </ul>
      *
      * @see SWT
      * @see Widget#getStyle
      */
     public CTabItem(CTabFolder parent, int style) {
         this(parent, style, parent.getItemCount());
     }

     /**
      * Constructs a new instance of this class given its parent
      * (which must be a <code>CTabFolder</code>), a style value
      * describing its behavior and appearance, and the index
      * at which to place it in the items maintained by its parent.
      * <p>
      * The style value is either one of the style constants defined in
      * class <code>SWT</code> which is applicable to instances of this
      * class, or must be built by <em>bitwise OR</em>'ing together
      * (that is, using the <code>int</code> "|" operator) two or more
      * of those <code>SWT</code> style constants. The class description
      * lists the style constants that are applicable to the class.
      * Style bits are also inherited from superclasses.
      * </p>
      *
      * @param parent a CTabFolder which will be the parent of the new instance (cannot be null)
      * @param style the style of control to construct
      * @param index the index to store the receiver in its parent
      *
      * @exception IllegalArgumentException <ul>
      *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
      * </ul>
      * @exception SWTException <ul>
      *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
      * </ul>
      *
      * @see SWT
      * @see Widget#getStyle
      */
     public CTabItem(CTabFolder parent, int style, int index) {
         super(parent, checkStyle(style));
         parent.createItem(this, index);
     }

     private static int checkStyle(int style) {
         return SWT.NONE;
     }

     public void dispose() {
         if (isDisposed())
             return;
         parent.destroyItem(this);
         super.dispose();
         parent = null;
         control = null;
         toolTipText = null;
     }

     /**
      * Returns a rectangle describing the receiver's size and location
      * relative to its parent.
      *
      * @return the receiver's bounding column rectangle
      *
      * @exception SWTException <ul>
      *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
      *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
      * </ul>
      */
     public Rectangle getBounds() {
         //checkWidget();
         return new Rectangle(x, y, width, height);
     }

     /**
      * Gets the control that is displayed in the content are of the tab item.
      *
      * @return the control
      *
      * @exception SWTError(ERROR_THREAD_INVALID_ACCESS)
      *	when called from the wrong thread
      * @exception SWTError(ERROR_WIDGET_DISPOSED)
      *	when the widget has been disposed
      */
     public Control getControl() {
         checkWidget();
         return control;
     }

     public Display getDisplay() {
         if (parent == null)
             SWT.error(SWT.ERROR_WIDGET_DISPOSED);
         return parent.getDisplay();
     }

     /**
      * Get the image displayed in the tab if the tab is disabled.
      *
      * @return the disabled image or null
      */
     public Image getDisabledImage() {
         //checkWidget();
         return disabledImage;
     }

     /**
      * Returns the receiver's parent, which must be a <code>CTabFolder</code>.
      *
      * @return the receiver's parent
      */
     public CTabFolder getParent() {
         //checkWidget();
         return parent;
     }

     /**
      * Returns the receiver's tool tip text, or null if it has
      * not been set.
      *
      * @return the receiver's tool tip text
      *
      * @exception SWTException <ul>
      *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
      *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
      * </ul>
      */
     public String getToolTipText() {
         checkWidget();
         return toolTipText;
     }

     /**
      * Paint the receiver.
      */
     void onPaint(GC gc, boolean isSelected) {

         if (width == 0 || height == 0)
             return;

         Display display = getDisplay();
         Color highlightShadow = display
                 .getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW);
         Color normalShadow = display
                 .getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);

         int index = parent.indexOf(this);

         if (isSelected) {

             Rectangle bounds = null;
             if (!parent.onBottom) {
                 if (index == parent.topTabIndex) {
                     bounds = new Rectangle(x + 1, y + 1, width - 2, height - 1);
                 } else {
                     bounds = new Rectangle(x + 2, y + 1, width - 3, height - 1);
                 }
             } else {
                 if (index == parent.topTabIndex) {
                     bounds = new Rectangle(x + 1, y + 1, width - 2, height - 2);
                 } else {
                     bounds = new Rectangle(x + 2, y + 1, width - 3, height - 2);
                 }
             }
             if (parent.backgroundImage != null) {
                 // draw a background image behind the text
                 Rectangle imageRect = parent.backgroundImage.getBounds();
                 gc.drawImage(parent.backgroundImage, 0, 0, imageRect.width,
                         imageRect.height, bounds.x, bounds.y, bounds.width,
                         bounds.height);
             } else if (parent.gradientColors != null) {
                 // draw a gradient behind the text
                 Color oldBackground = gc.getBackground();
                 if (parent.gradientColors.length == 1) {
                     if (parent.gradientColors[0] != null)
                         gc.setBackground(parent.gradientColors[0]);
                     gc.fillRectangle(bounds.x, bounds.y, bounds.width,
                             bounds.height);
                 } else {
                     Color oldForeground = gc.getForeground();
                     Color lastColor = parent.gradientColors[0];
                     if (lastColor == null)
                         lastColor = oldBackground;
                     for (int i = 0, pos = 0; i < parent.gradientPercents.length; ++i) {
                         gc.setForeground(lastColor);
                         lastColor = parent.gradientColors[i + 1];
                         if (lastColor == null)
                             lastColor = oldBackground;
                         gc.setBackground(lastColor);
                         int gradientWidth = (parent.gradientPercents[i]
                                 * bounds.width / 100)
                                 - pos;
                         gc.fillGradientRectangle(bounds.x + pos, bounds.y,
                                 gradientWidth, bounds.height, false);
                         pos += gradientWidth;
                     }
                     gc.setForeground(oldForeground);
                 }
                 gc.setBackground(oldBackground);
             }

             // draw tab lines
             if (!parent.onBottom) {
                 gc.setForeground(normalShadow);
                 if (index != parent.topTabIndex) {
                     gc.drawLine(x + 1, y, x + 1, y);
                     gc.drawLine(x, y + 1, x, y + height - 2);
                     gc.drawLine(x, y + height - 1, x, y + height - 1);
                 }
                 gc.drawLine(x + width - 1, y, x + width - 1, y);
                 gc.drawLine(x + width, y + 1, x + width, y + height - 2);
                 gc.drawLine(x + width, y + height - 1, x + width, y + height
                         - 1);

                 gc.setForeground(highlightShadow);
                 if (index != parent.topTabIndex) {
                     gc.drawLine(x + 2, y, x + 2, y);
                     gc.drawLine(x + 1, y + 1, x + 1, y + height - 2);
                     gc.drawLine(x + 1, y + height - 1, x + 1, y + height - 1);
                 } else {
                     gc.drawLine(x, y, x, y + height - 1);
                 }

                 gc.drawLine(x + width - 2, y, x + width - 2, y);
                 gc
                         .drawLine(x + width - 1, y + 1, x + width - 1, y
                                 + height - 2);
                 gc.drawLine(x + width - 1, y + height - 1, x + width - 1, y
                         + height - 1);

                 // light line across top
                 if (index != parent.topTabIndex) {
                     gc.drawLine(x + 3, y, x + width - 3, y);
                 } else {
                     gc.drawLine(x + 1, y, x + width - 3, y);
                 }
             } else {
                 gc.setForeground(normalShadow);
                 if (index != parent.topTabIndex) {
                     gc.drawLine(x, y, x, y);
                     gc.drawLine(x, y + 1, x, y + height - 2);
                     gc.drawLine(x + 1, y + height - 1, x + 1, y + height - 1);
                 }
                 gc.drawLine(x + width, y, x + width, y);
                 gc.drawLine(x + width, y + 1, x + width, y + height - 2);
                 gc.drawLine(x + width - 1, y + height - 1, x + width - 1, y
                         + height - 1);

                 gc.setForeground(highlightShadow);
                 if (index != parent.topTabIndex) {
                     gc.drawLine(x + 1, y, x + 1, y);
                     gc.drawLine(x + 1, y + 1, x + 1, y + height - 2);
                     gc.drawLine(x + 2, y + height - 1, x + 2, y + height - 1);
                 } else {
                     gc.drawLine(x, y, x, y + height - 1);
                 }

                 gc.drawLine(x + width - 1, y, x + width - 1, y);
                 gc
                         .drawLine(x + width - 1, y + 1, x + width - 1, y
                                 + height - 2);
                 gc.drawLine(x + width - 2, y + height - 1, x + width - 2, y
                         + height - 1);

                 // light line across top and bottom
                 if (index != parent.topTabIndex) {
                     gc.drawLine(x + 1, y, x + width - 2, y);
                     gc.drawLine(x + 2, y + height - 1, x + width - 3, y
                             + height - 1);
                 } else {
                     gc.drawLine(x + 1, y, x + width - 2, y);
                     gc.drawLine(x + 1, y + height - 1, x + width - 3, y
                             + height - 1);
                 }
             }
             if (parent.isFocusControl()) {
                 // draw a focus rectangle
                 int x1, y1, width1, height1;
                 if (!parent.onBottom) {
                     if (index == parent.topTabIndex) {
                         x1 = x + 1;
                         y1 = y + 1;
                         width1 = width - 2;
                         height1 = height - 1;
                     } else {
                         x1 = x + 2;
                         y1 = y + 1;
                         width1 = width - 3;
                         height1 = height - 1;
                     }
                 } else {
                     if (index == parent.topTabIndex) {
                         x1 = x + 1;
                         y1 = y + 1;
                         width1 = width - 2;
                         height1 = height - 2;
                     } else {
                         x1 = x + 2;
                         y1 = y + 1;
                         width1 = width - 3;
                         height1 = height - 2;
                     }
                 }
                 gc.setBackground(display.getSystemColor(SWT.COLOR_BLACK));
                 gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
                 gc.drawFocus(x1, y1, width1, height1);
             }
         } else {
             // draw tab lines for unselected items
             gc.setForeground(normalShadow);
             if (!parent.onBottom) {
                 if (index != parent.topTabIndex
                         && index != parent.getSelectionIndex() + 1) {
                     gc.drawLine(x, y, x, y + (height / 2));
                 }
             } else {
                 if (index != parent.topTabIndex
                         && index != parent.getSelectionIndex() + 1) {
                     gc.drawLine(x, y + (height / 2), x, y + height - 1);
                 }
             }

         }

         // draw Image
         int xDraw = x + LEFT_MARGIN;

         Image image = getImage();
         if (!isSelected && image != null) {
             Image temp = getDisabledImage();
             if (temp != null) {
                 image = temp;
             }
         }
         if (image != null) {
             Rectangle imageBounds = image.getBounds();
             int imageX = xDraw;
             int imageHeight = Math.min(height - BOTTOM_MARGIN - TOP_MARGIN,
                     imageBounds.height);
             int imageY = y + (height - imageHeight) / 2;
             int imageWidth = imageBounds.width * imageHeight
                     / imageBounds.height;
             gc.drawImage(image, imageBounds.x, imageBounds.y,
                     imageBounds.width, imageBounds.height, imageX, imageY,
                     imageWidth, imageHeight);
             xDraw += imageWidth + INTERNAL_SPACING;
         }

         // draw Text
         int textWidth = x + width - xDraw - RIGHT_MARGIN;
         if (isSelected && parent.showClose) {
             textWidth = x + width - xDraw - parent.closeBar.getSize().x
                     - RIGHT_MARGIN;
         }
         if (shortenedText == null || shortenedTextWidth != textWidth) {
             shortenedText = shortenText(gc, getText(), textWidth);
             shortenedTextWidth = textWidth;
         }
         String text = shortenedText;

         if (isSelected && parent.selectionForeground != null) {
             gc.setForeground(parent.selectionForeground);
         } else {
             gc.setForeground(parent.getForeground());
         }
         int textY = y + (height - gc.textExtent(text, SWT.DRAW_MNEMONIC).y) / 2;
         gc.drawText(text, xDraw, textY, SWT.DRAW_TRANSPARENT
                 | SWT.DRAW_MNEMONIC);

         gc.setForeground(parent.getForeground());
     }

     private static String shortenText(GC gc, String text, int width) {
         if (gc.textExtent(text, SWT.DRAW_MNEMONIC).x <= width)
             return text;

         int ellipseWidth = gc.textExtent(ellipsis, SWT.DRAW_MNEMONIC).x;
         int length = text.length();
         int end = length - 1;
         while (end > 0) {
             text = text.substring(0, end);
             int l1 = gc.textExtent(text, SWT.DRAW_MNEMONIC).x;
             if (l1 + ellipseWidth <= width) {
                 return text + ellipsis;
             }
             end--;
         }
         return text + ellipsis;
     }

     /**
      * Answer the preferred height of the receiver for the GC.
      */
     int preferredHeight(GC gc) {
         Image image = getImage();
         int height = 0;
         if (image != null)
             height = image.getBounds().height;
         String text = getText();
         height = Math.max(height, gc.textExtent(text, SWT.DRAW_MNEMONIC).y);
         return height + TOP_MARGIN + BOTTOM_MARGIN;
     }

     /**
      * Answer the preferred width of the receiver for the GC.
      */
     int preferredWidth(GC gc) {
         int width = 0;
         Image image = getImage();
         if (image != null)
             width += image.getBounds().width;
         String text = getText();
         if (text != null) {
             if (image != null)
                 width += INTERNAL_SPACING;
             width += gc.textExtent(text, SWT.DRAW_MNEMONIC).x;
         }
         if (parent.showClose)
             width += INTERNAL_SPACING + preferredHeight(gc); // closebar will be square and will fill preferred height
         return width + LEFT_MARGIN + RIGHT_MARGIN;
     }

     /**
      * Sets the control that is used to fill the client area of
      * the tab folder when the user selects the tab item.
      * <p>
      * @param control the new control (or null)
      *
      * @exception IllegalArgumentException <ul>
      *    <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li>
      *    <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</li>
      * </ul>
      * @exception SWTException <ul>
      *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
      *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
      * </ul>
      */
     public void setControl(Control control) {
         checkWidget();
         if (control != null) {
             if (control.isDisposed())
                 SWT.error(SWT.ERROR_INVALID_ARGUMENT);
             if (control.getParent() != parent)
                 SWT.error(SWT.ERROR_INVALID_PARENT);
         }
         if (this.control != null && !this.control.isDisposed()) {
             this.control.setVisible(false);
         }
         this.control = control;
         if (this.control != null) {
             int index = parent.indexOf(this);
             if (index == parent.getSelectionIndex()) {
                 this.control.setBounds(parent.getClientArea());
                 this.control.setVisible(true);
             } else {
                 this.control.setVisible(false);
             }
         }
     }

     public void setImage(Image image) {
         checkWidget();
         if (image != null && image.equals(getImage()))
             return;
         super.setImage(image);
         parent.resetTabSize(true);
     }

     /**
      * Sets the image that is displayed if the tab item is disabled.
      * Null will clear the image.
      *
      * @param image the image to be displayed when the item is disabled or null
      *
      * @exception SWTException <ul>
      *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
      *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
      * </ul>
      */
     public void setDisabledImage(Image image) {
         checkWidget();
         if (image != null && image.equals(getDisabledImage()))
             return;
         disabledImage = image;
         parent.redraw();
     }

     /**
      * Set the widget text.
      * <p>
      * This method sets the widget label.  The label may include
      * mnemonic characters but must not contain line delimiters.
      *
      * @param string the new label for the widget
      *
      * @exception IllegalArgumentException <ul>
      *    <li>ERROR_NULL_ARGUMENT - if the text is null</li>
      * </ul>
      * @exception SWTException <ul>
      *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
      *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
      * </ul>
      */
     public void setText(String string) {
         checkWidget();
         if (string.equals(getText()))
             return;
         super.setText(string);
         shortenedText = null;
         shortenedTextWidth = 0;
         parent.resetTabSize(false);
     }

     /**
      * Sets the receiver's tool tip text to the argument, which
      * may be null indicating that no tool tip text should be shown.
      *
      * @param string the new tool tip text (or null)
      *
      * @exception SWTException <ul>
      *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
      *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
      * </ul>
      */
     public void setToolTipText(String string) {
         checkWidget();
         toolTipText = string;
     }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2004 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.ui.internal.presentations.r21.widgets;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.SWTError;
	import org.eclipse.swt.SWTException;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.GC;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.graphics.Rectangle;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Item;
	import org.eclipse.swt.widgets.Widget;

	public class CTabItem extends Item {
	CTabFolder parent;

	int x, y, width, height = 0;

	String toolTipText;

	Control control; // the tab page

	private Image disabledImage;

	// internal constants
	static final int LEFT_MARGIN = 4;

	static final int RIGHT_MARGIN = 4;

	static final int TOP_MARGIN = 3;

	static final int BOTTOM_MARGIN = 3;

	private static final int INTERNAL_SPACING = 2;

	private static final String ellipsis = "..."; //$NON-NLS-1$

	String shortenedText;

	int shortenedTextWidth;

	/**
	* Constructs a new instance of this class given its parent
	* (which must be a <code>CTabFolder</code>) and a style value
	* describing its behavior and appearance. The item is added
	* to the end of the items maintained by its parent.
	* <p>
	* The style value is either one of the style constants defined in
	* class <code>SWT</code> which is applicable to instances of this
	* class, or must be built by <em>bitwise OR</em>'ing together
	* (that is, using the <code>int</code> "\|" operator) two or more
	* of those <code>SWT</code> style constants. The class description
	* lists the style constants that are applicable to the class.
	* Style bits are also inherited from superclasses.
	* </p>
	*
	* @param parent a CTabFolder which will be the parent of the new instance (cannot be null)
	* @param style the style of control to construct
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
	* </ul>
	*
	* @see SWT
	* @see Widget#getStyle
	*/
	public CTabItem(CTabFolder parent, int style) {
	this(parent, style, parent.getItemCount());
	}

	/**
	* Constructs a new instance of this class given its parent
	* (which must be a <code>CTabFolder</code>), a style value
	* describing its behavior and appearance, and the index
	* at which to place it in the items maintained by its parent.
	* <p>
	* The style value is either one of the style constants defined in
	* class <code>SWT</code> which is applicable to instances of this
	* class, or must be built by <em>bitwise OR</em>'ing together
	* (that is, using the <code>int</code> "\|" operator) two or more
	* of those <code>SWT</code> style constants. The class description
	* lists the style constants that are applicable to the class.
	* Style bits are also inherited from superclasses.
	* </p>
	*
	* @param parent a CTabFolder which will be the parent of the new instance (cannot be null)
	* @param style the style of control to construct
	* @param index the index to store the receiver in its parent
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
	* </ul>
	*
	* @see SWT
	* @see Widget#getStyle
	*/
	public CTabItem(CTabFolder parent, int style, int index) {
	super(parent, checkStyle(style));
	parent.createItem(this, index);
	}

	private static int checkStyle(int style) {
	return SWT.NONE;
	}

	public void dispose() {
	if (isDisposed())
	return;
	parent.destroyItem(this);
	super.dispose();
	parent = null;
	control = null;
	toolTipText = null;
	}

	/**
	* Returns a rectangle describing the receiver's size and location
	* relative to its parent.
	*
	* @return the receiver's bounding column rectangle
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public Rectangle getBounds() {
	//checkWidget();
	return new Rectangle(x, y, width, height);
	}

	/**
	* Gets the control that is displayed in the content are of the tab item.
	*
	* @return the control
	*
	* @exception SWTError(ERROR_THREAD_INVALID_ACCESS)
	* when called from the wrong thread
	* @exception SWTError(ERROR_WIDGET_DISPOSED)
	* when the widget has been disposed
	*/
	public Control getControl() {
	checkWidget();
	return control;
	}

	public Display getDisplay() {
	if (parent == null)
	SWT.error(SWT.ERROR_WIDGET_DISPOSED);
	return parent.getDisplay();
	}

	/**
	* Get the image displayed in the tab if the tab is disabled.
	*
	* @return the disabled image or null
	*/
	public Image getDisabledImage() {
	//checkWidget();
	return disabledImage;
	}

	/**
	* Returns the receiver's parent, which must be a <code>CTabFolder</code>.
	*
	* @return the receiver's parent
	*/
	public CTabFolder getParent() {
	//checkWidget();
	return parent;
	}

	/**
	* Returns the receiver's tool tip text, or null if it has
	* not been set.
	*
	* @return the receiver's tool tip text
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public String getToolTipText() {
	checkWidget();
	return toolTipText;
	}

	/**
	* Paint the receiver.
	*/
	void onPaint(GC gc, boolean isSelected) {

	if (width == 0 \|\| height == 0)
	return;

	Display display = getDisplay();
	Color highlightShadow = display
	.getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW);
	Color normalShadow = display
	.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);

	int index = parent.indexOf(this);

	if (isSelected) {

	Rectangle bounds = null;
	if (!parent.onBottom) {
	if (index == parent.topTabIndex) {
	bounds = new Rectangle(x + 1, y + 1, width - 2, height - 1);
	} else {
	bounds = new Rectangle(x + 2, y + 1, width - 3, height - 1);
	}
	} else {
	if (index == parent.topTabIndex) {
	bounds = new Rectangle(x + 1, y + 1, width - 2, height - 2);
	} else {
	bounds = new Rectangle(x + 2, y + 1, width - 3, height - 2);
	}
	}
	if (parent.backgroundImage != null) {
	// draw a background image behind the text
	Rectangle imageRect = parent.backgroundImage.getBounds();
	gc.drawImage(parent.backgroundImage, 0, 0, imageRect.width,
	imageRect.height, bounds.x, bounds.y, bounds.width,
	bounds.height);
	} else if (parent.gradientColors != null) {
	// draw a gradient behind the text
	Color oldBackground = gc.getBackground();
	if (parent.gradientColors.length == 1) {
	if (parent.gradientColors[0] != null)
	gc.setBackground(parent.gradientColors[0]);
	gc.fillRectangle(bounds.x, bounds.y, bounds.width,
	bounds.height);
	} else {
	Color oldForeground = gc.getForeground();
	Color lastColor = parent.gradientColors[0];
	if (lastColor == null)
	lastColor = oldBackground;
	for (int i = 0, pos = 0; i < parent.gradientPercents.length; ++i) {
	gc.setForeground(lastColor);
	lastColor = parent.gradientColors[i + 1];
	if (lastColor == null)
	lastColor = oldBackground;
	gc.setBackground(lastColor);
	int gradientWidth = (parent.gradientPercents[i]
	* bounds.width / 100)
	- pos;
	gc.fillGradientRectangle(bounds.x + pos, bounds.y,
	gradientWidth, bounds.height, false);
	pos += gradientWidth;
	}
	gc.setForeground(oldForeground);
	}
	gc.setBackground(oldBackground);
	}

	// draw tab lines
	if (!parent.onBottom) {
	gc.setForeground(normalShadow);
	if (index != parent.topTabIndex) {
	gc.drawLine(x + 1, y, x + 1, y);
	gc.drawLine(x, y + 1, x, y + height - 2);
	gc.drawLine(x, y + height - 1, x, y + height - 1);
	}
	gc.drawLine(x + width - 1, y, x + width - 1, y);
	gc.drawLine(x + width, y + 1, x + width, y + height - 2);
	gc.drawLine(x + width, y + height - 1, x + width, y + height
	- 1);

	gc.setForeground(highlightShadow);
	if (index != parent.topTabIndex) {
	gc.drawLine(x + 2, y, x + 2, y);
	gc.drawLine(x + 1, y + 1, x + 1, y + height - 2);
	gc.drawLine(x + 1, y + height - 1, x + 1, y + height - 1);
	} else {
	gc.drawLine(x, y, x, y + height - 1);
	}

	gc.drawLine(x + width - 2, y, x + width - 2, y);
	gc
	.drawLine(x + width - 1, y + 1, x + width - 1, y
	+ height - 2);
	gc.drawLine(x + width - 1, y + height - 1, x + width - 1, y
	+ height - 1);

	// light line across top
	if (index != parent.topTabIndex) {
	gc.drawLine(x + 3, y, x + width - 3, y);
	} else {
	gc.drawLine(x + 1, y, x + width - 3, y);
	}
	} else {
	gc.setForeground(normalShadow);
	if (index != parent.topTabIndex) {
	gc.drawLine(x, y, x, y);
	gc.drawLine(x, y + 1, x, y + height - 2);
	gc.drawLine(x + 1, y + height - 1, x + 1, y + height - 1);
	}
	gc.drawLine(x + width, y, x + width, y);
	gc.drawLine(x + width, y + 1, x + width, y + height - 2);
	gc.drawLine(x + width - 1, y + height - 1, x + width - 1, y
	+ height - 1);

	gc.setForeground(highlightShadow);
	if (index != parent.topTabIndex) {
	gc.drawLine(x + 1, y, x + 1, y);
	gc.drawLine(x + 1, y + 1, x + 1, y + height - 2);
	gc.drawLine(x + 2, y + height - 1, x + 2, y + height - 1);
	} else {
	gc.drawLine(x, y, x, y + height - 1);
	}

	gc.drawLine(x + width - 1, y, x + width - 1, y);
	gc
	.drawLine(x + width - 1, y + 1, x + width - 1, y
	+ height - 2);
	gc.drawLine(x + width - 2, y + height - 1, x + width - 2, y
	+ height - 1);

	// light line across top and bottom
	if (index != parent.topTabIndex) {
	gc.drawLine(x + 1, y, x + width - 2, y);
	gc.drawLine(x + 2, y + height - 1, x + width - 3, y
	+ height - 1);
	} else {
	gc.drawLine(x + 1, y, x + width - 2, y);
	gc.drawLine(x + 1, y + height - 1, x + width - 3, y
	+ height - 1);
	}
	}
	if (parent.isFocusControl()) {
	// draw a focus rectangle
	int x1, y1, width1, height1;
	if (!parent.onBottom) {
	if (index == parent.topTabIndex) {
	x1 = x + 1;
	y1 = y + 1;
	width1 = width - 2;
	height1 = height - 1;
	} else {
	x1 = x + 2;
	y1 = y + 1;
	width1 = width - 3;
	height1 = height - 1;
	}
	} else {
	if (index == parent.topTabIndex) {
	x1 = x + 1;
	y1 = y + 1;
	width1 = width - 2;
	height1 = height - 2;
	} else {
	x1 = x + 2;
	y1 = y + 1;
	width1 = width - 3;
	height1 = height - 2;
	}
	}
	gc.setBackground(display.getSystemColor(SWT.COLOR_BLACK));
	gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
	gc.drawFocus(x1, y1, width1, height1);
	}
	} else {
	// draw tab lines for unselected items
	gc.setForeground(normalShadow);
	if (!parent.onBottom) {
	if (index != parent.topTabIndex
	&& index != parent.getSelectionIndex() + 1) {
	gc.drawLine(x, y, x, y + (height / 2));
	}
	} else {
	if (index != parent.topTabIndex
	&& index != parent.getSelectionIndex() + 1) {
	gc.drawLine(x, y + (height / 2), x, y + height - 1);
	}
	}

	}

	// draw Image
	int xDraw = x + LEFT_MARGIN;

	Image image = getImage();
	if (!isSelected && image != null) {
	Image temp = getDisabledImage();
	if (temp != null) {
	image = temp;
	}
	}
	if (image != null) {
	Rectangle imageBounds = image.getBounds();
	int imageX = xDraw;
	int imageHeight = Math.min(height - BOTTOM_MARGIN - TOP_MARGIN,
	imageBounds.height);
	int imageY = y + (height - imageHeight) / 2;
	int imageWidth = imageBounds.width * imageHeight
	/ imageBounds.height;
	gc.drawImage(image, imageBounds.x, imageBounds.y,
	imageBounds.width, imageBounds.height, imageX, imageY,
	imageWidth, imageHeight);
	xDraw += imageWidth + INTERNAL_SPACING;
	}

	// draw Text
	int textWidth = x + width - xDraw - RIGHT_MARGIN;
	if (isSelected && parent.showClose) {
	textWidth = x + width - xDraw - parent.closeBar.getSize().x
	- RIGHT_MARGIN;
	}
	if (shortenedText == null \|\| shortenedTextWidth != textWidth) {
	shortenedText = shortenText(gc, getText(), textWidth);
	shortenedTextWidth = textWidth;
	}
	String text = shortenedText;

	if (isSelected && parent.selectionForeground != null) {
	gc.setForeground(parent.selectionForeground);
	} else {
	gc.setForeground(parent.getForeground());
	}
	int textY = y + (height - gc.textExtent(text, SWT.DRAW_MNEMONIC).y) / 2;
	gc.drawText(text, xDraw, textY, SWT.DRAW_TRANSPARENT
	\| SWT.DRAW_MNEMONIC);

	gc.setForeground(parent.getForeground());
	}

	private static String shortenText(GC gc, String text, int width) {
	if (gc.textExtent(text, SWT.DRAW_MNEMONIC).x <= width)
	return text;

	int ellipseWidth = gc.textExtent(ellipsis, SWT.DRAW_MNEMONIC).x;
	int length = text.length();
	int end = length - 1;
	while (end > 0) {
	text = text.substring(0, end);
	int l1 = gc.textExtent(text, SWT.DRAW_MNEMONIC).x;
	if (l1 + ellipseWidth <= width) {
	return text + ellipsis;
	}
	end--;
	}
	return text + ellipsis;
	}

	/**
	* Answer the preferred height of the receiver for the GC.
	*/
	int preferredHeight(GC gc) {
	Image image = getImage();
	int height = 0;
	if (image != null)
	height = image.getBounds().height;
	String text = getText();
	height = Math.max(height, gc.textExtent(text, SWT.DRAW_MNEMONIC).y);
	return height + TOP_MARGIN + BOTTOM_MARGIN;
	}

	/**
	* Answer the preferred width of the receiver for the GC.
	*/
	int preferredWidth(GC gc) {
	int width = 0;
	Image image = getImage();
	if (image != null)
	width += image.getBounds().width;
	String text = getText();
	if (text != null) {
	if (image != null)
	width += INTERNAL_SPACING;
	width += gc.textExtent(text, SWT.DRAW_MNEMONIC).x;
	}
	if (parent.showClose)
	width += INTERNAL_SPACING + preferredHeight(gc); // closebar will be square and will fill preferred height
	return width + LEFT_MARGIN + RIGHT_MARGIN;
	}

	/**
	* Sets the control that is used to fill the client area of
	* the tab folder when the user selects the tab item.
	* <p>
	* @param control the new control (or null)
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li>
	* <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setControl(Control control) {
	checkWidget();
	if (control != null) {
	if (control.isDisposed())
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	if (control.getParent() != parent)
	SWT.error(SWT.ERROR_INVALID_PARENT);
	}
	if (this.control != null && !this.control.isDisposed()) {
	this.control.setVisible(false);
	}
	this.control = control;
	if (this.control != null) {
	int index = parent.indexOf(this);
	if (index == parent.getSelectionIndex()) {
	this.control.setBounds(parent.getClientArea());
	this.control.setVisible(true);
	} else {
	this.control.setVisible(false);
	}
	}
	}

	public void setImage(Image image) {
	checkWidget();
	if (image != null && image.equals(getImage()))
	return;
	super.setImage(image);
	parent.resetTabSize(true);
	}

	/**
	* Sets the image that is displayed if the tab item is disabled.
	* Null will clear the image.
	*
	* @param image the image to be displayed when the item is disabled or null
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setDisabledImage(Image image) {
	checkWidget();
	if (image != null && image.equals(getDisabledImage()))
	return;
	disabledImage = image;
	parent.redraw();
	}

	/**
	* Set the widget text.
	* <p>
	* This method sets the widget label. The label may include
	* mnemonic characters but must not contain line delimiters.
	*
	* @param string the new label for the widget
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the text is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setText(String string) {
	checkWidget();
	if (string.equals(getText()))
	return;
	super.setText(string);
	shortenedText = null;
	shortenedTextWidth = 0;
	parent.resetTabSize(false);
	}

	/**
	* Sets the receiver's tool tip text to the argument, which
	* may be null indicating that no tool tip text should be shown.
	*
	* @param string the new tool tip text (or null)
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setToolTipText(String string) {
	checkWidget();
	toolTipText = string;
	}
	}